Infusion bag squeezing assembly

ABSTRACT

A filter bag has at least one thread forming a pair of spaced apart first and second loops extending between a bottom and top region of the filter bag. The filter bag further has a support traversed by the thread, which forms a loop above the support. The loop is sized so a user can pull the thread and the bag upward toward the support to a squeezing position of the filter bag, wherein the bottom region thereof is lifted toward the top region.

FIELD OF THE INVENTION

[0001] The invention relates to a squeezing assembly adapted to enhancebrewing of infusible product. Particularly, the invention relates to afilter bag for infusible products selected from the group consisting oftea, coffee, extracted beverages and the like.

BACKGROUND OF THE INVENTION

[0002] It is almost impossible to imagine a modern household whosemembers do not consume tea or coffee. Big cities and small townschampion a great variety of coffee and tea chains turning industriesthat manufacture these products in one of the most fast growing segmentsof our economy. Efficiency, compactness and convenience provide awidespread use of bags containing infusible products for rapidly brewingand preparing beverages.

[0003] A variety of such bags can generally be categorized as havingfour main types of filter bags. Common to all of these types is the factthat the increase in the contact area between the liquid and theinfusion product accelerates the infusion process. Also, a method ofbrewing or preparing a beverage is rather uniform and, as is known,includes soaking a bag at the time of consumption in a container withwater.

[0004] One of the traditional types of filter bag is a multi-layer bagmade of porous material and having a substantially pyramidal shape. Thistype of bag is flat and is limited in its capacitative volume, which onimmersion in the water tightly holds the product. A fundamentalrequirement for efficient brewing is an increased contact surfacebetween the liquid and the infusion product particles that enables agreater unit utilization of the product. Clearly, a type of filter bagdescribed above is in contrast with this requirement and ischaracterized by a slow volume growth and poor dissolution of theproduct. As a consequence, the infusion process is slow.

[0005] Another type of filter bag is basically similar to theabove-described one and has two layers of face-to-face superimposedlayers of porous paper and a number of folds along opposite sides.Although this structure is intended to improve a volume growth, inpractice, it has been found that these folds allow only a partialswelling of the product when immersed in the water. Expansion of productparticles is not nearly enough to allow the water to flow freelytherethrough.

[0006] Still another type of filter bag envisages multiple sections,each of which contains the product, with or without lateral folds.Typically, the sections are densely packed one against the other, withlittle possibility of opening out at the bottom, and none in upper area.Allowing the swelling, the product is pressed against the walls of eachindividual compartment with reciprocal contact with the walls of theneighboring compartment. As a result, the water flow is partiallyblocked by the compressed particles of the product.

[0007] A further structure of filter bag has been developed to allow itto assume two stable positions. A generally flat position has been foundto be particularly convenient for storage and for packaging in lots forsale. The other position is for three-dimensional use. The internalvolume in this structure is manifestly greater than in previouslydiscussed structures. However, similar to those structures, the lowerarea of the bag still contains compressed product particles uponswelling during infusion.

[0008] The practical embodiment of such a three-dimensional filter bagis furthermore problematic both from the point of view of productioncapacity and consequently, from the standpoint of production costs.

[0009] Traditionally, the upper terminal section of filter bags isshaped with a polygonal profile generally of a trapezoidal development.A thread is departably attached to the upper terminal section and isalways anchored to a tag or label forming the pick-up element for thehandling of the filter bag. Typically, a user shakes a filter bag toenhance penetration of water through the product particles. Yet, as hasbeen discussed, typically an infusion process is far from satisfactoryand, regardless of numerous types of filter bag, the process isinefficient because only a small fraction of product particles isinfused.

[0010] To enhance brewing, users simply tend to squeeze a filter bag.This practical utilization of filter bag certainly achieves the intendedresults, but it also has negative consequences. One of them is the factthat by pressing against the walls of filter bag, a user may burn his orher fingers. The other consequence is that a filter bag may beaccidentally torn apart, and product particles flowing into a capsuspend therein.

[0011] U.S. Pat. No. 4,250,990 to Casper discloses an extendablecrossbar serving as a supporting surface for vertically displaceablefilter bags. As a result of a generally triangular shape, the supportingsurface acts laterally upon the walls of filter bag, particularly, on anupper region thereof, as the bag is displaceable upward. However, toprovide a desirable result a user has to literally punch the supportingsurface acting, in turn, on the tea bag.

[0012] Typically, lateral forces leave lower most particle-concentratedareas of filter bag unaffected. Further, because of esthetic andstructural considerations, the supporting surface may not be deep andnarrow enough to effectively act even upon upper regions of the bag.Thus, while preventing a user from direct contact with a hot bag, thisstructure is far from solving a problem of better utilization of theproduct.

[0013] U.S. Pat. No. 5,797,243 illustrates a typical packaging assemblyof filter tea bag having an outer bag which is stapled with a tag. Afilter bag having its upper region folded and attached to one end ofthread is oscillatory displaceable along a vertical direction uponapplying an external force to an outer end of the thread. As is typicalto all of the above-discussed types of filter bag, here an externalforce is applied only to one end of the thread so the bag's bottom isleft unexposed to a squeezing action. Consequently, the lower mostproduct-concentrated region of filter bag remains practically untouched.

[0014] What is desired, therefore, is a squeezing assembly that enablesefficient utilization of the infusible product. Providing a squeezingassembly that effectively presses against lower regions of the filterbags is also desirable, as is a filter bag whose bottom is exposed tovertical upwardly acting forces.

SUMMARY OF THE INVENTION

[0015] This is achieved by provision of a tea bag assembly having theincreased contact surface between an infusion product and a squeezingfilament allowing the bag's bottom to be squeezed in both lateral andvertical directions.

[0016] The tea bag includes a filter bag provided with at least onefilament looping around the bag's bottom and attached to a lifting bar.Upon raising the lifting bar to a position, wherein an upper region ofthe filter bag presses against a supporting surface, a user may furthersqueeze the filter bag, so that its bottom is brought upwardly towardthe supporting surface.

[0017] According to one aspect of the invention, a filter bag is able tomove up due to vertically directed tension forces applied to a liftingmember. This embodiment features at least one filament looping aroundthe bottom of filter bag and having its upper end connected to thelifting member. The filament allows the bag to be primarily exposed tovertical forces and secondary to lateral forces fairly uniformlysqueezing the product particles all over the bottom region of the bag.

[0018] In accordance with another aspect of he invention, a supportproviding a reliable limiting surface that acts downward upon thesqueezed filter bag contributes to vertically directed tension forces,thereby enhancing a brewing process. Having a variety of shapes, thesupport is sized to predominantly generate vertical forces, and onlythen it may act as a wedging surface generating lateral forces.

[0019] Still another aspect of the invention relates to a particularcircular arrangement of filter bag that has a single continuous filamentsewn along the bag's perimeter. This particular embodiment provides auniform pressing force that has its components directed in mutuallyperpendicular planes.

[0020] The invention also discloses a variety of outer bags used eitherindividually or in combination with a support to provide a verticallydirected force. A combination of such outer bag and continuous filamentsgenerates substantially uniform forces pressing against a lower bottomregion of filter bag.

[0021] It is therefore an object of the invention to provide a filterbag assembly enabling efficient utilization of infusible product.

[0022] Still another object of the invention is to provide a filter bagassembly having at least one filament attached to the bag's bottom so asto provide a vertical squeezing force uniformly acting upon a bottomregion of filter bag.

[0023] Yet another object of the invention is to provide a filter bagassembly having a support generating a force directed opposite to apulling force which is applied to the filter bag during brewing as it isgradually displaceable towards the support.

[0024] Another object of the invention is to provide a filter bagassembly having a structure enabling easy displacement of filter bag ina vertical plane.

[0025] A further object of the invention is to provide a filter baghaving an annular shape enabling a continuous filament sewn along aperimeter of the bag to provide substantially uniform squeezing ofproduct particles during its displacement towards a support.

[0026] The invention and its particular features and advantages willbecome more apparent from the following detailed description consideredwith reference to the accompanying drawings.

BRIEF DESCRIPTION OF THE DRAWINGS

[0027]FIG. 1 is an isometric view of a filter bag assembly according tothe invention shown in a rest position.

[0028]FIG. 2 is an isometric view of filter bag assembly of FIG. 1 shownin a squeezing position.

[0029]FIG. 3 is an isometric view of filter bag assembly according toanother embodiment of the invention having a flat support surface.

[0030]FIG. 4 is an isometric view of filter bag assembly of FIG. 3 shownin a squeezing position.

[0031]FIG. 5 is an isometric view of filter bag assembly according tostill another embodiment of the invention.

[0032]FIG. 6 is an isometric view of filter bag assembly of FIG. 5 shownin a squeezing position.

[0033]FIG. 7 is a perspective view of the filter bag of FIG. 5.

[0034]FIG. 8 is a perspective view of the filter bag of FIG. 7 shown ina squeezing position.

[0035]FIG. 9 is an isometric view of still another embodiment of theinvention showing an annular filter bag.

[0036]FIG. 10 is an isometric view of yet another embodiment of theinvention.

[0037]FIG. 11 is a perspective view if a filter bag substantiallysimilar to embodiments shown in FIGS. 1-4 and shown in a brewingposition.

[0038]FIG. 12 is a perspective view of a filter bag of FIG. 11 but shownin a squeezing position thereof.

[0039]FIG. 13 is a perspective view of a filter bag, which is anembodiment of the filter bag shown in FIGS. 11-12, and is shown in abrewing position.

[0040]FIG. 14 is a filter bag of FIG. 13 shown in a squeezing positionthereof.

[0041]FIG. 15 is a perspective view of another embodiment of the filterbag shown in FIG. 1.

[0042] FIGS. 16-18 are perspective views of still another embodiments ofthe filter bag shown in FIG. 1.

[0043] FIGS. 19-20 are perspective views of still further embodiments ofthe filter bag shown in FIG. 1.

[0044]FIG. 21 is an isometric view showing the filter bag of FIG. 1provided with broader strips.

[0045]FIG. 22 is an isometric view illustrating still a furtherembodiment of the filter bag of FIG. 1.

[0046]FIG. 23 is an isometric view illustrating still another embodimentof the filter bag.

DETAILED DESCRIPTION OF THE DRAWINGS

[0047] Referring to FIGS. 1-10 a filter bag assembly is shown anddescribed in its various embodiments, where identical parts are denotedby the same numeral references.

[0048] Particularly, FIGS. 1 and 2 illustrate a filter bag assembly 2including at least one filament 12 wrapped about a bottom 11 of a filterbag 10. The filament, which is in this case includes a single thread 12,allows the filter bag to be compressed in a vertical direction as aresult of applying a pulling force to the upper end of the filament 12.As is clearly illustrated in these drawings, the filament surroundingthe filter bag 10 provides a fairly uniform distribution of squeezingforces acting on all regions of the filter bag including a bottom regionwith the highest concentration of infusible product particles.

[0049] Enhancement of squeezing ability of the filter bag, as shown inFIGS. 1 and 2, is particularly achieved by the thread 12 formingsubstantially equally sized and shaped parallel longitudinal regions10′, 10″ and 10′″ on the bag's peripheral surface. Insertion of thethread is simple and begins with attaching a first base portions 14 ofthe thread to the bottom 11.

[0050] Numerous methods of attachment are available. For example, onecan pierce a lower region of the filter bag with one end of the tread.Another method is simply to fuse or glue the base portion of the treadto an exterior of the bottom 11. In either case, ends of the thread 12are attached to a top region 16 of the filter bag to form the firststretch 18. After extending the free ends through first and second holes22, 24 of a support 14, the free ends again are connected to the filterbag in the reverse order of forming the first stretch. As a result, thethread's second stretch 26, extending through the support and attachedto two spaced-apart locations at the top region of the bag, and thethird stretch 20 looping around the bag's periphery are formed after thethread's ends are interconnected.

[0051] Having reached its squeezing position as a result of the externalpulling force applied to the thread 12, as seen in FIG. 2, the bag's topregion 16 meets the support 14 that may controllably extend over theentire width of the bag 10. Since the thread 12 attached to the liftingelement 26 displaces the bottom 11 parallel to this support 14, furtherapplication of external pulling forces causes the filter bag touniformly reduce its vertical dimension. A squeezing action lasts untila pulling force applied by a user to the lifting element is balanced byan oppositely directed pressing force generated upon contact between thetop region 16 and the support 14. Due to the uniform distribution ofsqueezing forces and the increased contact surface between the liquidand the infusion product particles, one obtains efficient unitutilization without applying excessive pulling forces.

[0052] A material used for manufacturing the filter bag is porous andrelatively thin. The support 14 may be made of any light material, suchas plastic, and, in order to prevent contact between a user and thefilter bag in its squeezing position, may be provided with a formation14′. It is contemplated within the scope of this invention to have thesupport that is extendable to cover differently sized containers. Asshown in FIGS. 1 and 2, the support 14 has a dome shape, wherein aninner cross-sectional area 14′″ is sized to predominantly generatevertically directed forces. Preferably, each semi-circled edge 14″ isequal to at least one third (⅓) of the total support length L. Only,upon applying excessive pulling forces, the support can generate lateralforces that at the point of its origination are superfluous since thebrewing or inflation process is substantially over.

[0053] The support 14 has a pair of holes 22, 24 traversed by the thread12 which is attached to a lifting element 26. The latter can havedifferent shapes and sizes. Particularly, in the embodiment shown inFIGS. 1 and 2 the lifting element 26 has a U-shaped central portionflanked by identical lateral wings, so that a user can easily hold thecentral portion while lifting the element 26 to the squeezing positionof the assembly.

[0054] The assembly operates in the following manner. A user pulls thelifting member by one of his or her hands and, while holding his otherhand on the formation 14′, provides displacement of the bag and thesupport relative to each other. Once the top 16 of the filter bagreaches the inner surface 14′″ of the support, the thread is extended atfull length indicating that a beverage is ready. However, a user cancontinue to pull the lifting element 26 until oppositely acting pressingand pulling forces reach a state of equilibrium. Clearly, the infusion'sconcentration generally is a function of the pulling force and durationof holding the filter bag in a reservoir filled with water. Hence, auser intuitively can cease a squeezing action at any point during theinfusion process, thereby achieving a desirable state of the beverage.Using a lifting element, it is easy to remove the once used filter bagfrom the reservoir, and, if the bag was not totally squeezed, it wouldbe possible to reuse it.

[0055] Turning to FIGS. 3 and 4 another embodiment of a support 32 isshown. In contrast to the support shown in FIGS. 1 and 2, here thesupport 32 is flat. Thus, in a squeezing position shown in FIG. 4, nolateral forces act upon the filter bag 10. This embodiment isdistinguished by its structural simplicity without, however, sacrificingits effectiveness. A lateral projection 34 serves as a support for theuser's finger.

[0056] Optionally, the embodiments shown in FIGS. 1-4 can be usedwithout the lifting element. The thread 18 is formed with an upper loop36 serving as a lifting element for the user. Alternatively, the liftingelement still can be used with the single continuous thread that has anupper end formed as a loop.

[0057] Although, the projection 34 is laterally spaced from alongitudinal axis L of the entire assembly, a pulling force P seen inFIG. 4 causes the swollen wet filter bag 10 to spread out along asufficiently large surface of an inner face of the support 32. Once theuser feels that the support is ready to swing, it is a reliableindication that the bag is fully squeezed and the infusion process issubstantially finished.

[0058]FIGS. 5 and 6 illustrate a support 44 formed with a pair ofdisplaceable resilient flaps 46, 48 that provide a squeezing action asthe filter bag 10 moves upward. While this embodiment provides squeezingof the bag both in lateral and vertical directions, the threads 18attached to the bottom enable the latter to be effectively squeezed.Also, a wedge action produced by the flaps 46 and 48 prevents reversedisplacement of the bag as it upwardly advances to its squeezingposition, as shown in FIG. 6.

[0059] Referring to FIG. 7, the filter bag 10 has a single filamentthreaded through and anchored to the top 16. A free end of the filamentfurther penetrates the bottom region 11, and after being threadedthrough the top 16, it is received between the lips 46, 48. Finally, thefree end is attached to a tag that can serve as a lifting element.

[0060]FIG. 8 illustrates the filter bag in one of its squeezingpositions. It is clear that penetration of the filter bag is a functionof a pulling force applied to the lifting element. To facilitate asqueezing process, the support is made of material flexible enough toprovide easy deformation of the lips 46, 48 during the bag'sdisplacement.

[0061] Another aspect of the invention is illustrated in FIG. 9 andrelates to a filter bag 54 having an annular shape. Preferably, a broadstrip 56 whose end is attached to a lifting element peripherally beltsthe bag 54. Similarly to the previously disclosed embodiments, the stripacts on the bottom 11 providing squeezing of the bag in a verticaldirection in response to a pulling force. A single strip having its freeends attached to the lifting element or tag is shown. However, it isunderstood that a number of strips are easily available for thisembodiment. During application of the pulling force to the liftingelement, the strip uniformly squeezes the bag's annular periphery and,as a consequence, brings the bottom 11 toward the top 16 after it hasreached the support 44.

[0062] According to still another aspect of the invention shown in FIG.10, the upper stretch of the of the filament 18 is connected to a tag 92that has an adhesive surface allowing a user to anchor the wholeassembly to an outer surface of reservoir. Thus, it is not necessary toimmediately start an infusion process. A user may leave the filter bagin the reservoir for some time before he or she initiates a squeezingprocess.

[0063] Referring to FIGS. 11-20, different techniques of attaching astrip are shown. Particularly, FIGS. 11 and 12 illustrate the filter bagprovided with the single strip 60 whose base portion 62 is located at atop 64. Free ends of the strip 60 extending towards and penetrating abottom 66 of the filter bag belt a periphery 68 and are threaded throughthe top 64 at separate locations 70 and 72. Penetrating further througha support 74 the free ends are attached to a tag or lifting elements 76,thereby making the strip 60 continuous.

[0064]FIG. 12 illustrates a squeezing position of the filter bag shownin FIG. 11. As clearly seen in this figure, the strip 60 forms threeregions 78, 80 and 82 on the filter bag thereby effectively eliminatinga possibility of any part of the bottom 66 to remain unsqueezed.

[0065] As shown in FIGS. 11 and 12, the support 74 is formed with a pairof openings 59 traversed by the strip or strips 60. Clearly, this holeshave a diameter which is sufficient to allow the support and the stripto be freely displaceable relative each other. The hole 59 is furtherformed with a narrow slit 61 used by a user to arrest displacement ofthe support relative to the strip. This feature is particularlyadvantageous when a user wants to leave the filter bag in a containerand a tag is not provided with an adhesive layer.

[0066]FIG. 13 illustrates two strips 84 attached to the filter bag 10.Each of the threads is threaded through the top 64 and the bottom 66 tofurther penetrate the top 64, thereby forming two loops around the bag'speriphery. Upon penetrating a circular support 86, opposite ends of thestrips are attached to the tag 76. A squeezing position of the filterbag, as shown in FIG. 14, is similar to the one shown in FIG. 12 and ischaracterized by three adjacent regions 78, 80 and 82 formed duringdisplacement of the bottom toward the top of the filter bag.

[0067]FIGS. 15 and 16 show a single strip 86 belting a periphery of thebag 10 substantially midway between the bag's opposite sides. The onlydifference between these two embodiments is that the strip 86 of FIG. 16is affixed to an exterior of the bottom 66, whereas FIG. 15 illustratesthe strip that is threaded through the bottom of the bag.

[0068] According to FIG. 17, the strip 86 first attached to the bottomof the bag has its free ends penetrating the bag's top in the samelocation 90 to form a loop around the bag's periphery. The ends furtherpenetrate the support and are finally attached to the tag, therebyforming a second loop.

[0069] Attachment of a single strip 96, as shown in FIG. 18, differsfrom the previously described techniques in that that its one end 98 isfirst affixed to the tag and then penetrates the bag's top twice to befurther threaded through the bag's bottom. This one end furtherpenetrates the top at another location 100, and upon traversing thesupport, is attached to the tag, thereby completing a continuous paththereof.

[0070]FIGS. 19 and 20 illustrate a bell-shaped support 102 receiving thefilter bag 10 in its squeezing position as shown in FIG. 20. In thisembodiment, the bag filter is uniformly squeezed by vertically andlaterally acting forces generated by an interior of the support. Athree-dimensional support, as shown in FIGS. 19 and 20, may havedifferent shapes varying from triangular to circular to rectangular.

[0071] As shown in FIG. 21, a strip can have different sizes. Increasinga width of the strip can translate to an increased reliability of thefilter bag since there is less chance to tear it apart. Preferably, thebroad filaments are glued to the bottom and walls of the filter bag.

[0072]FIG. 22 illustrates another embodiment of the filter bag 10 whichhas at least one filament attached thereto so that the bag is dividedinto two prismatic and one triangular regions. The free end of the stripis attached to a lifting element. This construction allows peripheralregions of the bottom to be upwardly displaced toward a point locatedalong an axis of symmetry that coincides with the upper stretch of thefilament.

[0073]FIG. 23 illustrates the filter bag which is formed with apyramidal top portion forming a pocket. A filament is attached to thebag's bottom by its opposite ends and is adapted to be pulled upward bya user holding a tag. The upward displacement of the bag's bottom isarrested once it is introduced into the pocket, which has atriangularly-shaped interior continuously squeezing the bottom inresponse to applying a pulling force to the tag.

[0074] The infusible product can be selected from a wide variety ofbeverages including, for example, tea, coffee, juices, soups and thelike. Also, a material of filter bags can be made of a great variety ofporous fabrics that can be permeable to provide efficient penetration ofwater through product particles contained in the filter bag. It isclearly seen that the inventive concept does not require modification ofalready existing tea bags and can be easily implemented in the existingequipment.

[0075] Although the invention has been described with reference to aparticular arrangement of parts, features and the like, these are notintended to exhaust all possible arrangements or features, and indeedmany other modification and variations will be ascertainable to those ofskill in the art.

What is claimed is:
 1. A squeezing device comprising: a bag containinginfusible product and having a bottom and top region; a support havingan inner surface facing the top region of the bag; and at least onefilament having a lower stretch looping around the bottom region of thebag and an upper stretch extending through the support, the bag and thesupport being displaceable relative to one another upon applying alifting force to the upper stretch of the one filament so as to bringthe bag in a squeezing position, wherein the bottom region of the bag isdisplaced towards the upper region which urges against the inner surfaceof the support.
 2. The device defined in claim 1 wherein the onefilament has one of opposite ends thereof threaded through the bottomregion, so as to form a first loop on the bag upon threading the ends ofthe thread through the top region, the ends further traversing thesupport and being sequentially threaded through the top and the bottomregion of the bag, thereby forming a second loop on the bag spaced apartfrom the first loop upon attaching the ends together.
 3. The devicedefined in claim 1, further comprising a lifting element receiving theupper stretch of the one filament and adapted to be held by a user. 4.The device defined in claim 3 wherein the lifting element includes twospaced apart flat surfaces bridged by a C-shape intermediate surface. 5.The device defined in claim 1 wherein the support has a C cross-sectionand extends at least along a substantial portion of the top region ofthe bag.
 6. The device defined in claim 1 wherein the support has atleast one thoroughgoing hole traversed by the upper stretch of the onefilament and an outer surface formed with a formation which extendsupwardly from the support, the hole including a first region having adiameter at least equal to a width of the filament and a second regionhaving a diameter less than the width, so that displacement of thefilament and the support relative each other can be arrested upondisplacing the filament into the second region.
 7. The device defined inclaim 1 wherein the inner surface of the support is flat, the supportfurther being formed with a lateral extension adapted to be pressed uponby a user.
 8. The device defined in claim 1, further comprising anotherfilament having a lower and upper stretch, the upper stretches of theone and other filaments being connected to one another above thesupport, and the lower stretches extending peripherally along anexterior of the filter bag under the bottom region and toward the topregion to form two spaced apart loops on the bag.
 9. The device definedin claim 8 wherein the lower stretches of one and other filaments areparallel to one another and form three rectangular regions on the bag.10. The device defined in claim 8 wherein lower stretches are inclinedtoward one another to form two spaced trapezoidal regions and atriangular region.
 11. The device defined in claim 1 wherein the supporthas a pair of resilient flaps formed substantially in a central regionof the support and displaceable upward and away from another upon movingthe bag towards the squeezing position, the flaps preventing rearwarddisplacement of the bag.
 13. The device defined in claim 1 wherein thebag has a cross-section selected from the group consisting of pyramidaland annular cross section.
 14. The device defined in claim 14 whereinthe bag having the circular cross-section is formed with a peripheralannular edge receiving the lower stretch of one filament.
 15. The devicedefined in claim 1, further comprising a tag connected to the upperstretch of the filament and having a side covered by an adhesive. 16.The device defined in claim 1, further comprising an outer bag receivingthe support and having a pocket which has a shape similar to a shape ofthe bag.
 17. The device defined in claim 17 wherein the shape of thepocket is selected from the group consisting of semicircular, pyramidaland polygonal shape.
 18. A squeezing device comprising: a filter bagcontaining infusible product and having a bottom and top region; asupport having an inner surface facing the top region of the bag; and asingle filament forming a pair of spaced apart loops extending betweenthe bottom and top regions of the filter bag and an upper stretchconnecting the loops and extending through the support, the bag and thesupport being displaceable relative to one another upon applying alifting force to the upper stretch of the filament, so as to bring thebag in a squeezing position, wherein the bottom region of the bag isdisplaced towards its upper region which, in turn, urges against theinner surface of the support.
 19. A method of manufacturing a filter bagcontaining infusible product, the method comprising the steps of:forming a first loop of at least one thread extending between a bottomand top region of the filter bag; extending ends of the one threadthrough a support facing the upper region of the filter bag; forming asecond loop of the one thread spaced from the first one on theperipheral wall of the filter bag; and upwardly displacing an upperstretch of the one thread formed above the support in a squeezingposition, wherein the upper region of the bag is in contact with thesupport so as to enable the first and second loops to vertically squeezeand displace the bottom region toward the upper region.
 20. A squeezingdevice comprising: a filter bag containing infusible product and havinga bottom and top; a support facing the top of the bag; and at least onecontinuous filament extending between the bottom and the support toprovide displacement of the bag relative to the support upon applying alifting force to the filament, so as to bring the bag in a squeezingposition, wherein the bottom of the bag is displaced towards its top.21. A squeezing device comprising: a filter bag containing infusibleproduct and having a bottom and top; and at least one continuousfilament extending between the bottom and the support to providedisplacement of the bag relative to the support upon applying a liftingforce to the filament, so as to bring the bag in a squeezing position,wherein the bottom of the bag is displaced towards its top.
 22. Thesqueezing device defined in claim 21 wherein the top has a pocketopening towards and receiving the bottom of the filter bag in thesqueezing position, said pocket being shaped to arrest upwarddisplacement of the bottom upon applying the lifting force.